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I am working on a simulated TIA Portal project which entails generating integer values and would like it to display on the HMI screen. The way I chose to generate these values is to initialize them as an integer value on a data block. To make it look more realistic to the process, I would like these values to fluctuate close to the initialized value in the data block. I would like to "fluctuate" these values a few units or a percentage and show this fluctuation on an HMI screen. I would like some suggestions as to how to do this in a looping manner.